Machine for cutting sections from tire-casings



J. .BRUNDAGE. MACHINE FOR CUTTING SECTIONS FROM TIRE CASINGS.

APPLICATION FILED AUG. I2, 1920.

Patented NOV. 22, 1921.

4 SHEETS-SHEET I.

a nvewtoz James W fligundaae, 32, at M944; MM

J.' .BHUNDAGE. MACHINE FOR CUTTING szcnous FROM TIRE CASINGS.

4 SHEETS-SHEET 2- Elvwentoz:

James WBnunda e,

J. W. BRUNDAGE.

MACHINE FOR CUTTING SECTIONS FROM TIRE CASINGS.

APPLICATION FILED AUG. 12, I920.

Patented Nov. 22, 1921.

4 SHEETS-SHEET a. K

nvewtoz Jizznes W Bnundaye,

g fi m Mh/M Quorum.

J. W. BRUNDAGE. MACHINE FOR cumm; szcnous raom TIRE CASINGS.

APPLICATION FILED HUG- ,1920- 1,398, 123. .Patented Nov. 22, 1921.

4 SHEETS-SHEET 4.

a wuewtot JAIME COIKPAILTZ, OF AKLRGN, O: I

37.". BRUNDAGE, Q1 AZPJON, 01-116, ASSEGNOR TO THE I ZILLER RUBBER O, A CDEPORATION OF OHIO.

MACHINE EOE CUTTIITG SECTIONS F1201?! TIRE-CASINGS.

specification or Letters Patent Patented Nov. 22, 1921.

Application filed August 12, 1920. Serial No. 402,980.

To tel? 10722 it wmg concern:

of sections to be used as mics and similar purposes.

object of the invention is to provide an apparatus by which smooth and regular 15 cuts may be made whereby the complete tire .ded into sections, all of which :ect is to provide a constructhe tire will be held in its form during the cutting acdistortion of the same pret on in when normal curved tion. and any vented. u

it further obiect is to provide an arrange ment which will eliminate the necessity of or fabric wrappine's which have heretore been commonly used to hold the tire upon the mandrel durine" the cutting, therebv saving the time and labor used in wrapping and the cost of the wraopings which destroyed by the action of the cutting knife.

Still another object is to provide a machine with a. tire supporting mandrel which will not be damaged by the action of the cutting lil'li'f. enablingthe same mandrel to be u er indefinitelyv dhth these and other objects in view the invention includes the novel features of construction and arrangement and combination ofnarts hereinafter described, the natu e and scope of my said invention being defined by the appended claims.

in embodiment of the invention is illusthe accompanyingdrawings, in

elevation of such a tire w'th the mandrel omitted illustration.

an enlarged elevation (partly side broken away) as viewed from the opposite direction from Fig. 1.

Fi e. 3 is a view of the parts shown in Fig. 1 as viewed from the left of said figure, and

Fig. at is a plan view, partly broken away.

Referringby reference characters to these drawings, the numeral 1 indicates a suitable supporting frame or table, above and upon which is journalcd in suitable bearings 2 2 a drive shaft 2, designed to be driven from any suitable source of power, such for example as the electric motor 3 connected to the sh: ft by belt and pulleys as shown.

The shaft 2 carries fast on the end thereof v spa gear or pinion 2" which meshes with external teeth of an annular rack or ring- 4-. This rack is rotatably carried by a plurality of equidistantly arranged spools or rollers 5, the gear ring being provided with beveled faces 4 engaging the correspondingly beveled faces of the spool heads or flanges 5.

T he spools are journaled upon stub axles or shafts 6 rigidly secured to a substantially ring-shaped vertical frame 7 supported from the main frame or table 1. The frame is provided with opening to receive the stub shafts 6 and is preferably provided with bosses 7 at the points where the openings are formed, thus affording better support for the axles without undue thickness of the frame, and the axles or shafts may be clamped in the opening by locking bolts 7'. Grease cups 8 may be provided for lubricating" the rollers through passages in the shafts in the manner well understood by those skilled in the art.

Secured to the gear ring 4 in any suitable manner for example by means of arms or proiections 9 is a ring 9 which supports a cutting knife in the manner hereinafter described, this cuttingknife, as it travels in a circular path, acting on the tire which issupported by a mandrel 10 secured to lll'Fi :ket arms 11 and 11 bolted to the machine :lrame, the mandrel projecting through the ring frame as shown. with its axis or center in alinemeut with the axis of the ring frame. lie tire is placed upon the mandrel plished by providinga radially disposed I operating; screw 16 whlch has a threaded engagement with the knife carrier, the screw beinc' rotatablv carried b the guldewa art "F Q 1 and being provided at its upper end w1..n a

' ratchet wheel 16 Cooperating with this ratchet wheel is a sprins' pressed pawl 17 which is carried by one arm of a two armed lever 18, the other arm of which is designed to cooperate with a fixed Contact member 19 carried by pedestal 19 mounted on the main frame.

its the ring frame rotates the free arm of the lever 18 will contact, once on each complete rotation, with the contact member 19 and be rocked thereby, imparting a thrust to the pawl and turning the ratchet wheel and likewise the screw to feed the knife toward the axis of rotation. A fined stop 18 cletermines the limit of movement of the lever 18 in one direction and a spring 21 holds it yieldingly in contact with said stop.

The spring may conveniently be a coiled spring having one end connected to the gruideway part and the other end connected to the pawl inside of the pivot so that one and the same spring tends to rock the lever 18 and keep the pawl pressed toward and into engagement with the teeth of the ratchet wheel.

In the use of the device a tire casing is severed at one part to enable the portion adja ei'it the cut to he slipped upon the man 7 drel 12 which is of arcuate shape to conform both in cross section and longitudinal curvature to the inside of the tire. For holding the tire firmly against displacement on the mandrel during the cutting operation a pair of clamping arms 22 and 23 are provided design l to embrace opposite edges of the tire casing; or shoe as shown in Fig. 2.

(line of these arms 23 is mounted on a solid or inner shaft 23% the other arm 22 being mounted on a tubular shaft 22 which surrounds shaft 23 and which is iournaled in a supporting bracket 24 carried by the main table or frame.

The shafts 22 and 23 carry at the opposite end 22 and 23* respectively to which are connected suitable means for actuaging the gripping arms to cause them to grip and release the edges of the tire as desiret V lily preferred means for so actuating the arms comprises a cable or flexible element 25, having its ends connected to the extremir ties of the arms 22* and 23*, and its intermediate portion passed down over or be tween guide pulleys 25, 25 journaled on fixed axes, the loop of the cable being passed around a pulley or sheave 26 from which is suspended a weight 27. The weight tends to move the gripping arms in position to press the edges of the tire toward each other and hold the tire against displacement during the cutting operation and the cable compensates for any inequalities in the edges of the tire due to position or thickness so that grippers will act with equal pressure.

To release the pressure on the gripping arms to enable the tire to be removed I. preferably provide a cable 28 (Fig. 1) which has one end attached to the frame 26 of sheave 26, said cable passing over a pulley E29 journaled on a fixed axis and connected at its lower end to a treadle lever 30.

The last or mandrel may be constructed of wood or any other material which will not injure the knife, or may be made of metal if. provided with a circumferential groove to receive the knife blade and deep enough to prevent contact of the edge of the blade with the bottom of the groove. If wood or other relatively soft material is used it will last indefinitely as the blade acts always in the same position relative to the last.

After a section has beensevered from the tire, the grippers are released, the section removed, and the tire slid forward on the last to bring a fresh portion into proper position whereafter the grippers are again brought into action, the knife in the interim luiving been returned to its outward position preparatory to the repetition. of the cutting action which return may be effected by disengaging the pawl and rotating the ratchet wheel in the reverse direction by hand.

It will be understood that the tire is slipped onto the mandrel from the inner or left hand end Figs. and the narrow horizontal portion of the left hand bracket 11 lying" in the open belly of the tire. The right hand. bracket ll serves as a stop to limit the movement of the tir on the mandrel and the adjustment screw 11 is provided to determine the length of section to be cut therefrom.

Having thus described my invention what I claim is I 1. A machine for cutting sections from pneumatic tire casings comprising an arcaate lost or mandrel adapted to support a tire, cutter means adapted to. travel circumferentially around the same, and. gripper means for engaging the edges of the tire.

.2. A machine for cutting sections from pneumatic tire casings comprising; an are shaped last or mandrel means supporting the ends of said mandrel, one of said supporting means constituting a stop or stage out- ,o i-uttei' mechanism carried by e s for eiiig cii'euznxerentiaily e1. (J21i'1' .illl "inie.

' and grip-oer means for l it. n acliine For uniting;

I tire easin a if; ring FJ'JJIUHS from "5 comprising a s L Y Lu J aiming sections from s c nipisnig an are i'uiiez's can) I a ring; 1 having a portion to iXBYQiOti waiis e1 5 ti to travel mandrel,

of said spool siiapnl sai cutter sin means joateu eenti-ai y of and extending into the piano i s -1 i 1 v J n f y it ennui ,oi siippoi ing a -11G (neon ith d the mandrel. sections from nipi'ising an arc ortion to receive 1 rotatable about @I 'Ii,)")91S for engagms for appiy- 1:01 eeding the -i-. Q1 machine s an in line w he cutting; edfl e of the utter.

11. A iilllffiliilO for out 111g sections from casings eoinpiising a rotary j frame having; an ,pen cenmeans for sappoi 'ing' and driving said e, a last lovatm Within said cutter car- 1 3 a too! carried by -id gnidewe 1 actuatin rneans .ioi' moving said tool shoe.

1. 1ml 1"" ano i .i stop aoa teu to said j a i'rame Yotatabiy *me, a last, said open centhe means for 'i l'iiflG for moving said tool siide. iandi'ei, and a ra- A machine 'i'oi' cutting; sections from by said frame. ii'e ca fois from a gear tatabiy engag:

, comprising);

and driving said iin said cutter 0:12-

hoidingr a info on means TO" ed with rad-i211 uieeway carried by said 5; int 2 L001 Sildicarried by said gflitiQWfiY, screw means for ictuztina' said too]. sl e oiding the pawl and ratchetor aetu: inst, anal a lie; 1 movable said screw means, d by said 1' ei'ating' said pavvi bin for cutting sections from naehine for "ii-e -asings comprising a home 'in s comprising an carried saie 1 L l 1G 1 L361} cent-e1, means for suggorting ."HCQOG, eon m to the inside of a tire. a QUYZDQ' frame, last disposed in v 021' arms pii'oted upon a comopen cent-e1 and adapted to roe id adapter to eniirace opposite cu ting ire, means to sin'mitaneousiy OT autoniatiea "ct ions from a firm nachine tor cutting sections from mpilsmg' a inst to IQI'QiYB a aii'an 'ed to move circumany about said Last a Hair of inde- 'oted grippers at ted to ened res o? the til 7 and single ans emnected t a so 4 arms 07 the on: s of said she I an open is cable having its ends connected to ongii the en of said arms, a pulley engaging m ..L a Q. :1 ...1 iniei lake 11o don QL sale on no, means for applying tension, to said pulley, and means for manually relieving said tension.

16. A machine for cutting sections from the casings comprising an arcuate last disposed to hold a tire in horizontal position, a pair of opposed, gripper members disposed adjacent M18 inner edge 01" the last and movable toward each other to engage the beaded edges of the tire and stretch the tire about the last, means for moving said grip- 10 per members toward and from each other and cutter means for severing; the tire.

In testimony whereof I allix my signature.

JAMES W. BRU NDAGE. 

